Coating thickness gauge



FIG. 1 is a front top perspective view of a coating thickness gaugeshowing my new design;

FIG. 2 is a rear bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plane view thereof; and,

FIG. 8 is a bottom plane view thereof.

The broken lines shown in the drawings depict portions of the articlethat form no part of the claimed design.

CLAIM The ornamental design for a coating thickness gauge, as shown anddescribed.